HEAT PUMP COMPRESSOR

PROBLEM TO BE SOLVED: To provide a rolling bearing for heat pump in which assembly workability is improved and cost is reduced.SOLUTION: A heat pump compressor rotates a rotary shaft rotatably supported by a plurality of bearings at an increased speed by a speed increasing mechanism, and rotates an impeller mounted on the rotary shaft at an increased speed. The plurality of bearings have a fixed side bearing and a free side bearing provided on both sides in the axial direction by sandwiching the speed increasing mechanism. The fixed side bearing has three pieces of angular ball bearings adjacent to each other via an inner ring spacer and an outer ring spacer, and out of the three pieces of angular ball bearings, the bearing adjacent to the speed increasing mechanism side includes a rolling body made of ceramic. Thereby, assembly workability is improved, and cost can be reduced.SELECTED DRAWING: Figure 1 【課題】組立作業性が向上し、コストを低減したヒートポンプ用転がり軸受を提供することを目的とする。【解決手段】複数の軸受によって回転自在に支持された回転軸を増速機構で増速回転させて、前記回転軸に取り付けられた羽根車を増速回転させるヒートポンプ圧縮機であって、複数の前記軸受は、前記増速機構を挟んで軸方向両側に設けられた固定側軸受及び自由側軸受を有し、前記固定側軸受は、互いに内輪間座及び外輪間座を介して隣り合う３個のアンギュラ玉軸受を有し、３個の前記アンギュラ玉軸受のうち、前記増速機構側に隣接する軸受は、セラミックよりなる転動体を備える。これにより、組立作業性を向上させ、コスト低減が可能となる。【選択図】図１